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Hi Sirs,
According to the TAS2563 datasheet page 53, the output volume Vamp = Input + Advc + Aamp (dBV).
Here we have two questions to calculate output level:
1. Advc was specified by DVC_PCM register, while we are not able to find it in TAS2563 datasheet. Would you pls advise the location of DVC_PCM?
2. The Aamp was specified by AMP_LEVEL on 0x03. Is it a voltage clip or a voltage gain since the unit of AMP_LEVEL is dBV? Does TAS2563 change output level by changing AMP_LEVEL along?
Thank you and Best regards,
Wayne Chen
02/24/2021
Hello Ivan,
Thanks a lot. The unit of AMP_LEVEL is dBV (reference to 1V in analog domain). How can we convert the digital input (dBFS) to output level with the AMP_LEVEL? According to my test result, we can convert 0dBFS input to AMP_LEVEL's specified Vp. Would you pls confirm it?
Input = 0dBFS 1kHz I2S,
CH1=OUT, CH2=OUT-, CH-M1=CH1-CH2, CH-M2=CH-M1 with LPF
# Set TAS2563 Amp_Level = 9.5dBV (4.221969Vpk)
w 90 00 00
w 90 7f 00
w 90 03 06
# Set TAS2563 Amp_Level = 8.5dBV (3.762833Vpk)
w 90 00 00
w 90 7f 00
w 90 03 02
Should we configure the AMP_LEVEL to 7.97Vpk if 8V PVDD was used in boost bypass mode?
-----------------------------------------------------------------------
# Set TAS2563 Amp_Level = 15dBV (7.952707Vpk)
w 90 00 00
w 90 7f 00
w 90 03 1c
-----------------------------------------------------------------------
Thank you and Best regards,
Wayne Chen
02/25/2021
